While filing through tracker I noticed something weird on the 1/44 upgrade for CA Houston:

Change tower armor from 62 to 0? Does anybody know the historical reason for this? Were there modifications made to reduce top heavyness or similar? Or other reasons like the new radar sets? Just wondering.

According to Friedman, that was the reason. New Orleans class should lose the conning tower as well(page 339), but in babeslight scenario, it is listed as 150 armor right to the end of the war. I think Friscos's tower was removed during repairs in early 43'.